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-rw-r--r--kamon-system-metrics/src/main/scala/kamon/metrics/HeapMetrics.scala82
1 files changed, 82 insertions, 0 deletions
diff --git a/kamon-system-metrics/src/main/scala/kamon/metrics/HeapMetrics.scala b/kamon-system-metrics/src/main/scala/kamon/metrics/HeapMetrics.scala
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+++ b/kamon-system-metrics/src/main/scala/kamon/metrics/HeapMetrics.scala
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+/*
+ * =========================================================================================
+ * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the
+ * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific language governing permissions
+ * and limitations under the License.
+ * =========================================================================================
+ */
+package kamon.metrics
+
+import java.lang.management.ManagementFactory
+
+import akka.actor.ActorSystem
+import com.typesafe.config.Config
+import kamon.metric._
+import kamon.metric.instrument.{ Gauge, Histogram }
+
+case class HeapMetrics(name: String) extends MetricGroupIdentity {
+ val category = HeapMetrics
+}
+
+object HeapMetrics extends MetricGroupCategory {
+ val name = "heap"
+
+ case object Used extends MetricIdentity { val name = "used-heap" }
+ case object Max extends MetricIdentity { val name = "max-heap" }
+ case object Committed extends MetricIdentity { val name = "committed-heap" }
+
+ case class HeapMetricRecorder(used: Gauge, max: Gauge, committed: Gauge)
+ extends MetricGroupRecorder {
+
+ def collect(context: CollectionContext): MetricGroupSnapshot = {
+ HeapMetricSnapshot(used.collect(context), max.collect(context), committed.collect(context))
+ }
+
+ def cleanup: Unit = {}
+ }
+
+ case class HeapMetricSnapshot(used: Histogram.Snapshot, max: Histogram.Snapshot, committed: Histogram.Snapshot)
+ extends MetricGroupSnapshot {
+
+ type GroupSnapshotType = HeapMetricSnapshot
+
+ def merge(that: GroupSnapshotType, context: CollectionContext): GroupSnapshotType = {
+ HeapMetricSnapshot(used.merge(that.used, context), max.merge(that.max, context), committed.merge(that.committed, context))
+ }
+
+ lazy val metrics: Map[MetricIdentity, MetricSnapshot] = Map(
+ Used -> used,
+ Max -> max,
+ Committed -> committed)
+ }
+
+ val Factory = new MetricGroupFactory {
+
+ val memory = ManagementFactory.getMemoryMXBean
+ def heap = memory.getHeapMemoryUsage
+
+ type GroupRecorder = HeapMetricRecorder
+
+ def create(config: Config, system: ActorSystem): GroupRecorder = {
+ val settings = config.getConfig("precision.jvm.heap")
+
+ val usedHeapConfig = settings.getConfig("used")
+ val maxHeapConfig = settings.getConfig("max")
+ val committedHeapConfig = settings.getConfig("committed")
+
+ new HeapMetricRecorder(
+ Gauge.fromConfig(usedHeapConfig, system)(() ⇒ heap.getUsed),
+ Gauge.fromConfig(maxHeapConfig, system)(() ⇒ heap.getMax),
+ Gauge.fromConfig(committedHeapConfig, system)(() ⇒ heap.getCommitted))
+ }
+ }
+}
+